I have the Curt bar with a set of Rock Jock tow bar mounts and a Brake Buddy. I have towed my Jeep from Oregon to Arizona and Arizona to Moab without issue.
Or this, complete with brake: https://www.readybrake.com/store/p284/Ready_Brute_Elite_II.html
Concerns I have with flat towing is wear on 35s and what if something breaks on the trail that eliminates the flat tow option?
Would be towing double behind a 32' 5th wheel. Full size car trailer is out of the question IMO.